Telescopic and foldable table

ABSTRACT

A telescopic and foldable table comprises a table frame having two supporting posts at two sides thereof; each post having a liftable inner tube; each post being installed to a transversal leg at a bottom end thereof; an upper end of the inner tube of the post having a pivotal unit which is pivotally installed to the table plane so that the table plane can pivotally move or transversally displace. By above mentioned components, the table is telescopic and foldable. Each post has a plurality of openings for determining the elevation of the post; each inner tube has a telescopic buckle and a control rod for controlling the telescopic movement of the buckle; and the control rod is controlled by a control unit protruding out of the inner tube. The pivotal unit is pivotally installed to a pivotal seat at a bottom surface of the table plane.

FIELD OF THE INVENTION

The present invention relates to tables, and particularly to atelescopic and foldable table, wherein the table has a simple andconcrete structure. Furthermore, the folding and expansion operations ofthe present invention are easily and rapid with a small volume. Therebythe cost in transfer is low.

BACKGROUND OF THE INVENTION

Conventionally, tables used in schools have fixed structures which areun-adjustable. However in school ages, people change their heightscontinuously and thus the prior art tables are not suitable for the usein schools.

Thereby in one improvement, the school table is modified to haveadjustable legs. By adjusting the height of the leg and then locking thelegs in the predetermined height, the table is fixed so as to suit thestudents of various heights. However these kinds of tables have nofunctions of pivotally moving and displacing the table plates and thelegs are unfoldable.

Furthermore, in adjusting the elevation of the table, the table platemust be supported by user's hands and then the screws are detached foradjusting the heights of the legs. The operation is inconvenient and itis not suitable of little boys or girls.

Thereby there is a demand for a novel design which can improveabove-mentioned prior art defects.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide atelescopic and foldable table, wherein table has a simple and concretestructure. Furthermore, the folding and expansion operations of thepresent invention are easily and rapid with a small volume. Thereby thecost in transfer is low.

To achieve above objects, the present invention provides a telescopicand foldable table which comprises a table frame having two supportingposts at two sides thereof; each post having a liftable inner tube; eachpost being installed to a transversal leg at a bottom end thereof; anupper end of the inner tube of the post having a pivotal unit which ispivotally installed to the table plane so that the table plane canpivotally move or transversally displace. By above mentioned components,the table is telescopic and foldable. Each post has a plurality ofopenings for determining the elevation of the post; each inner tube hasa telescopic buckle and a control rod for controlling the telescopicmovement of the buckle; and the control rod is controlled by a controlunit protruding out of the inner tube. The pivotal unit is pivotallyinstalled to a pivotal seat at a bottom surface of the table plane. Thepivotal seat is installed to a track at the bottom surface of the tableplane; and the pivotal seat is fixed or displace on the track by thecontrolling of a sliding buckle.

The various objects and advantages of the present invention will be morereadily understood from the following detailed description when read inconjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of the embodiment of the presentinvention.

FIG. 2 is a schematic view showing a descending operation of the tableplane of the present invention.

FIG. 3 is a schematic view showing the descending state of the tableplane according to the present invention.

FIG. 4 is a schematic view showing the transversal movement of the tableplane of the present invention.

FIG. 5 is a schematic view showing the table plane, sliding buckle, andtop block of the present invention.

FIG. 6 is a schematic view showing the installation of the pivotal seatand sliding buckle of the present invention.

FIG. 7 is a schematic view showing the upward movement of table plane ofthe present invention.

FIG. 8 is a schematic view about the receiving of the table plane of thepresent invention.

FIG. 9 is a schematic view showing that the table plane is received.

FIG. 10 is a schematic view showing the folding operation of the tableleg.

FIG. 11 is a schematic view about the folding of the present invention.

FIG. 12 is an assembled schematic view of the present invention.

FIG. 13 is a perspective view of the table plane of the presentinvention.

FIG. 14 shows the table plane of the present invention.

FIG. 15 is a right side view of FIG. 14.

FIG. 16 is a schematic view along line 16-16 of FIG. 14.

FIG. 17 is a perspective view about the pivotal seat of the presentinvention.

FIG. 18 shows the pivotal seat of the present invention.

FIG. 19 is a left side view of FIG. 18.

FIG. 20 is a right side view of FIG. 18.

FIG. 21 is an elevation view of FIG. 18.

FIG. 22 is a bottom view of FIG. 18.

FIG. 23 is a perspective view about the control rod of the presentinvention.

FIG. 24 shows the control rod of the present invention.

FIG. 25 is a left side view of FIG. 24.

FIG. 26 is a right side view of FIG. 24.

FIG. 27 is a bottom view of FIG. 24.

FIG. 28 is a perspective view showing the pivotal unit of the presentinvention

FIG. 29 shows the pivotal unit of the present invention.

FIG. 30 is a left side view of FIG. 29.

FIG. 31 is a right side view of FIG. 29.

FIG. 32 is an elevational view of FIG. 24.

FIG. 33 is a bottom view of FIG. 24.

FIG. 34 is a perspective view of the plug of the present invention.

FIG. 35 shows the plug of the present invention.

FIG. 36 is a left side view of FIG. 35.

FIG. 37 is a right side view of FIG. 35.

FIG. 38 is an elevational view of FIG. 35.

FIG. 39 is a bottom view of FIG. 35.

FIG. 40 is a perspective view of the sliding buckle of the presentinvention.

FIG. 41 shows the sliding buckle of the present invention.

FIG. 42 is a left side view of FIG. 41.

FIG. 43 is a right side view of FIG. 41.

FIG. 44 is an elevational view of FIG. 41.

FIG. 45 is a bottom view of FIG. 41.

FIG. 46 is a perspective view of the sliding block of the presentinvention.

FIG. 47 shows the sliding block of the present invention.

FIG. 48 is a left side view of FIG. 47.

FIG. 49 is a right side view of FIG. 47.

FIG. 50 is an elevational view of FIG. 47.

FIG. 51 is a bottom view of FIG. 47.

FIG. 52 is a perspective view of the control unit of the presentinvention.

FIG. 53 shows the control unit of the present invention.

FIG. 54 is a left side view of FIG. 53.

FIG. 55 is a right side view of FIG. 53.

FIG. 56 is an elevational view of FIG. 53.

FIG. 57 is a bottom view of FIG. 53.

FIG. 58 is a perspective view of the top block of the present invention.

FIG. 59 shows the top block of the present invention.

FIG. 60 is a left side view of FIG. 59.

FIG. 61 is a right side view of FIG. 59.

FIG. 62 is an elevational view of FIG. 59.

FIG. 63 is a bottom view of FIG. 59.

FIG. 64 is a perspective view of the buckle of the present invention.

FIG. 65 shows the buckle of the present invention.

FIG. 66 is a left side view of FIG. 64.

FIG. 67 is a right side view of FIG. 64.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand thepresent invention, a description will be described in the following indetails. However, these descriptions and the appended drawings are onlyused to cause those skilled in the art to understand the objects,features, and characteristics of the present invention, but not to beused to confine the scope and spirit of the present invention defined inthe appended claims.

Referring to FIGS. 1 to 11, the structure of the present invention isillustrated. The present invention has the following elements.

A table frame 1 has two supporting posts 11 at two sides thereof. Eachpost 11 has a liftable inner tube 12. Each inner tube 12 has atelescopic buckle 121 (referring to FIGS. 63 to 67) and a control rod 13(referring to FIGS. 23 to 27) for controlling the telescopic movement ofthe buckle 121. The control rod 13 is controlled by a control unit 131(referring to FIGS. 52 to 57) protruding out of the inner tube 12. Eachpost 11 has a transversal leg 2 at a bottom end thereof. An upper end ofthe inner tube 12 of the post 11 has a pivotal unit 4 (referring toFIGS. 28 to 33) which is pivotally installed to a pivotal seat 5(referring to FIGS. 17 to 22) at a bottom surface of the table plane 3.The pivotal seat 5 is installed to a track 30 at the bottom surface ofthe table plane 3. The pivotal seat 5 may be fixed or displace on thetrack 30 by the controlling of a sliding buckle 31.

Referring to FIG. 1, each post 11 has a plurality of openings 111 fordetermining the elevation of the post 11. A bottom of each inner tube 12has a plug 120 (referring to FIGS. 34 to 39). Each buckle is positionedto the telescopic buckle 121. Referring to FIG. 1, the buckle 121 isinstalled with a spring assembly groove for receiving a spring 122. Oneside of the spring 122 resists against an inner wall of the post 11 sothat the buckle 121 can be reduced inwards. The control rod 13 is placedbetween the two springs 122. When the control rod 13 descends to bebetween the two buckles 121. The two springs 122 compress inwards tomake the two buckles 121 protrude from the openings 111 of the post 11so as to have the effect of buckling and positioning. When the controlrod 13 lifts to separate from the two buckles 121, the springs extend sothat the two buckles 121 reduce inwards to separate from the openings111 of the post 11. Thus, the inner tube 12 is liftable and descendablefreely. The control rod 13 is assembled to a sliding block 123illustrated in FIGS. 46 to 51. The sliding block 123 is positioned andinstalled in the inner tube 12 and is controlled by the control unit 131out of the inner tube 12. Referring to FIGS. 52 to 57, the control unit131 is assembled to the sliding block 123 by using a screw topenetrating a long penetrating hole 124 of the inner tube 12. Thesliding block 123 is installed with a connecting groove 125 forconnecting a buckling head 130 at one end of the control rod 13.

Referring to FIGS. 4 to 6 and 12, each of two sides of the table plane 3is installed with a sliding buckle 31 and a spring 311 (as shown inFIGS. 40 to 45) and top block 32 and spring 321 (referring to FIGS. 58to 62). The bottom of the table plane 3 is installed with the track 30for installing the pivotal seat 5. Referring to FIGS. 17 to 22, thepivotal seat 5 is formed with a slot 50 for buckling the sliding buckle31. The top block 32 is displaceable on the table plane 3 by the spring32 in the spring assembly groove 320. When the top block 32 moves to apredetermined point, it can buckle the slot 50 of the pivotal seat 5.When the sliding buckle 31 is pressed so as to separate from the slot 50of the pivotal seat 5, the top block 32 will eject the pivotal seat 5 bythe elasticity of the spring 321. Thus the table plane 3 is movable.

The pivotal seat 5 is pivotally installed to a pivotal unit 4 at the topend of the inner tube 12. The pivotal seat 5 is fixedly installed to thetop end of the inner tube 12 and is shielded by a decorating plate 40.The decorating plate 40 is formed with a long penetrating hole 401corresponding to the long penetrating hole 124 of the inner tube 12 anda long penetrating hole 41 of the pivotal unit 4 so that the controlunit 131 can be assembled to the sliding block 123 in the inner tube 12to adjust the elevation of the control rod 13.

A transversal bar 10 is installed between the two posts 11 at two sidesof the table frame 1. The transversal bar 10 is installed with asupporting rod 101 which transversally moves along the table plane 3 forenhancing the structure of the table plane 3.

A pivotal device 20 is installed at a lower end of each post 11 topivotally install the leg 2. Each pivotal device 20 has a camberedopening 201. Thereby a treadable bar 21 is placed in the camberedopening 201. Thus, the pivotal device 20 can be positioned no matterwhether the legs 2 are folded or expanded. The opening 201 and the bar21 are known in the prior art and thus the details will not be furtherdescribed herein.

Referring to FIGS. 1 to 11, the operation schematic view of the presentinvention is illustrated. When it is desired to fold the table, as seein FIGS. 1, the control unit 131 is moved upwards by the hands of theuser so that the inner tubes 12 descend to be in the posts 11 of thetable frame 1. Then the sliding buckles 31 at two sides of the tableplane 3 are pressed so that the pivotal seat 5 is movable with respectto the table plane 3, as shown in FIG. 4. Then the table plane 3 ismoved upwards, as shown in FIG. 7. Then the table plane 3 is verticallyreceived, as shown in FIGS. 8 and 9. Finally, the legs 2 are folded, asshown in FIGS. 10 and 11 so that the whole table is in a folded state.The expansion of the table can be operated with a reverse sequence.

Advantages of the present invention will be described herein. Thepresent invention has a simple and concrete structure. Furthermore, thefolding and expansion operations of the present invention are easily andrapid with a small volume. Thereby the cost in transfer is low.

The present invention is thus described, it will be obvious that thesame may be varied in many ways. Such variations are not to be regardedas a departure from the spirit and scope of the present invention, andall such modifications as would be obvious to one skilled in the art areintended to be included within the scope of the following claims.

1. A telescopic and foldable table comprising: a table frame having twosupporting posts at two sides thereof; each post having a liftable innertube; each post being installed to a transversal leg at a bottom endthereof; an upper end of the inner tube of the post having a pivotalunit which is pivotally installed to the table plane so that the tableplane can pivotally move or transversally displace; wherein by abovementioned components, the table is telescopic and foldable.
 2. Thetelescopic and foldable table as claimed in claim 1, wherein each posthas a plurality of openings for determining the elevation of the post;each inner tube has a telescopic buckle and a control rod forcontrolling the telescopic movement of the buckle; and the control rodis controlled by a control unit protruding out of the inner tube.
 3. Thetelescopic and foldable table as claimed in claim 1, wherein the pivotalunit is pivotally installed to a pivotal seat at a bottom surface of thetable plane; the pivotal seat is installed to a track at the bottomsurface of the table plane; and the pivotal seat is fixed or displace onthe track by the controlling of a sliding buckle.
 4. The telescopic andfoldable table as claimed in claim 2, wherein a bottom end of the innertube is installed with a plug; the plug has a telescopic buckle; thebuckle is installed with a spring assembly grove for receiving a spring.5. The telescopic and foldable table as claimed in claim 2, wherein thecontrol rod is assembled to a sliding block; and the sliding block ispositioned and installed in the inner tube and is controlled by acontrol unit to move upwards and downwards; and the sliding block isinstalled with a buckling groove for connecting a buckling head at anend of the control rod.
 6. The telescopic and foldable table as claimedin claim 6, wherein the table plane is installed with a sliding buckleand a spring which are interactive with a top block and a second spring;a track is installed to a bottom surface of the table for assembling thepivotal seat.
 7. The telescopic and foldable table as claimed in claim1, wherein the pivotal seat is installed with a sliding opening forinstalling a sliding buckle.
 8. The telescopic and foldable table asclaimed in claim 1, wherein the pivotal unit is pivotally installed to apivotal seat at a bottom surface of the table plane; and the pivotalseat is pivotally installed to a pivotal unit at a top end of the innertube.
 9. The telescopic and foldable table as claimed in claim 1,wherein a transversal bar is installed between the two posts at twosides of the table frame; the transversal bar is installed with asupporting rod which transversally moves along the table plane forenhancing the structure of the table plane.